Messages in this thread | | | Date | Fri, 13 Jan 2017 16:39:27 +0800 | From | Herbert Xu <> | Subject | Re: x86-64: Maintain 16-byte stack alignment |
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On Thu, Jan 12, 2017 at 05:46:55PM -0800, Andy Lutomirski wrote: > > What I mean is: what guarantees that the stack is properly aligned for > the subroutine call? gcc promises to set up a stack frame, but does > it promise that rsp will be properly aligned to call a C function?
Yes, as long as you don't go behind its back and start directly pushing things onto the stack with inline asm.
Cheers, -- Email: Herbert Xu <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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